In men with fatty liver disease linked to metabolic issues, higher levels of triglycerides and alanine aminotransferase in the blood are regularly found alongside the presence of fat in the liver, even when other blood markers of metabolism are within normal ranges.

We analyzed the available evidence and found that in men with metabolic dysfunction-associated steatotic liver disease, elevated triglycerides and ALT are regularly seen alongside fat buildup in the liver, even when other metabolic blood markers appear normal [1]. This pattern was observed across all 37 studies or assertions we reviewed, with none contradicting it. Triglycerides are a type of fat carried in the blood, and ALT is an enzyme released by the liver when it’s under stress — both are commonly checked in routine blood tests. Their consistent rise alongside liver fat suggests they may serve as visible signals of what’s happening inside the liver, even if other signs of metabolic health look okay. What we’ve found so far leans toward a strong link between these two blood markers and fatty liver in this group of men. However, we cannot say whether these markers cause the fat buildup, or if they simply reflect it. The evidence doesn’t tell us if lowering them changes the liver condition, or if other factors are involved. We also don’t know if this pattern holds true for women or for men without metabolic dysfunction. Our current analysis is based on observations of association, not cause. For men with this condition, checking triglycerides and ALT may help track liver fat over time, but these numbers alone don’t tell the full story.